Prussian blue analogue-derived hollow metal oxide heterostructure for high-performance supercapacitors

Abstract

Supercapacitors (SCs) have been the subject of considerable concern due to their distinct advantages. SCs performance is directly affected by the electrode materials. Metal oxides derived from Prussian blue analogues...

Metal-Oxide Heterojunction: From Material Process to Neuromorphic Applications

“…In general, the synergetic effect between various metal oxides in a heterostructure facilitates electron/ion migration. More importantly, heterostructures often combine the advantages of all materials to achieve multiple advantages in various physical and chemical properties [ 61 , 63 , 64 ]. Excellent properties for electrocatalysis …”

“…( b ) Schematic diagram of the procedure for a hollow CuO/NiO/Co 3 O 4 heterostructure. Reprinted with permission from [ 61 ]. Copyright 2003, Royal Society of Chemistry.…”

“…(2) The electronic structure of CuO/NiO heterojunction can be well tuned and finally facilitate the electron/ion migration [61]. In another work, Ju et al proposed a ternary hollow CuO/ NiO/Co 3 O 4 heterostructure (Figure 3b) [61]. In this work, core-shell-structured Prussian blue analogs (PBAs) (NiHCC@CuHCC) with Ni-based PBAs (NiHCC) as the core and Cu-based PBAs (CuHCC) as the shell were prepared using the crystal seed method.…”

“…The enhanced electrochemical performance could benefit from the following characteristics: (1) The hollow structure can provide more active sites, reduce the structural strain, and keep the electrode from collapsing. (2) The electronic structure of CuO/NiO heterojunction can be well tuned and finally facilitate the electron/ion migration [61].…”